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2003

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Articles 3871 - 3876 of 3876

Full-Text Articles in Physical Sciences and Mathematics

Community Environmental Policing, Gregg P. Macey Dec 2002

Community Environmental Policing, Gregg P. Macey

Gregg P. Macey

This paper evaluates a new form of public participation in environmental monitoring and regulation advanced through local bucket brigades, which allow community members to sample air emissions near industrial facilities. These brigades represent a new form of community environmental policing, in which residents participate in collecting, analyzing, and deploying environmental information, and more importantly, in an array of public policy dialogues. Use of this sampling technology has had marked effects on local residents' perceptions and participation in emergency response and citizens' right-to-know. However, when viewed through the lens of the more developed literature on community policing, the bucket brigades are …

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Uniform Convergence Of Cesàro Means Of Negative Order Of Double Walsh-Fourier Series, Ushangi Goginava Dec 2002

Uniform Convergence Of Cesàro Means Of Negative Order Of Double Walsh-Fourier Series, Ushangi Goginava

Ushangi Goginava

No abstract provided.

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Challenges In Information Retrieval And Language Modeling, Jay Aslam, Nichols Belkin, Chris Buckley, Jamie Callan, Sue Dumais, Norbert Fuhr, Donna Harman, David J. Harper, Djoerd Hiemstra, Thomas Hofmann, Eduard Hovy, Wessel Kraaij, John Lafferty, Victor Lavrenko, David Lewis, Liz Liddy, R. Manmatha, Andrew Mccallum, Jay Ponte, John Prager, Dragomir Radev, Philip Resnik, Stephen Robertson, Roni Rosenfeld, Salim Roukos, Mark Sanderson, Rich Schwartz, Amit Singhal, Alan Smeaton, Howard Turtle, Ellen Voorhees, Ralph Weischedel, Jinxi Xu, Chengxiang Zhai Dec 2002

Challenges In Information Retrieval And Language Modeling, Jay Aslam, Nichols Belkin, Chris Buckley, Jamie Callan, Sue Dumais, Norbert Fuhr, Donna Harman, David J. Harper, Djoerd Hiemstra, Thomas Hofmann, Eduard Hovy, Wessel Kraaij, John Lafferty, Victor Lavrenko, David Lewis, Liz Liddy, R. Manmatha, Andrew Mccallum, Jay Ponte, John Prager, Dragomir Radev, Philip Resnik, Stephen Robertson, Roni Rosenfeld, Salim Roukos, Mark Sanderson, Rich Schwartz, Amit Singhal, Alan Smeaton, Howard Turtle, Ellen Voorhees, Ralph Weischedel, Jinxi Xu, Chengxiang Zhai

R. Manmatha

Information retrieval (IR) research has reached a point where it is appropriate to assess progress and to define a research agenda for the next five to ten years. This report summarizes a discussion of IR research challenges that took place at a recent workshop.

The attendees of the workshop considered information retrieval research in a range of areas chosen to give broad coverage of topic areas that engage information retrieval researchers. Those areas are retrieval models, cross-lingual retrieval, Web search, user modeling, filtering, topic detection and tracking, classification, summarization, question answering, metasearch, distributed retrieval, multimedia retrieval, information extraction, as well …

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Debating E-Commerce: Engaging Students In Current Events, Amber Settle, André Berthiaume Dec 2002

Debating E-Commerce: Engaging Students In Current Events, Amber Settle, André Berthiaume

Amber Settle

A fundamental task for information technology educators is to help students understand the basic ethical, social, and legal issues inherent in the discipline. We present a method for achieving this goal using in-class debates. Debates allow for a high-level of participation, demand that students conduct significant research, and provide an interactive environment. This encourages the development of communication skills and exposes students to alternative points of view. The debates were conducted in two courses that provide a survey of some aspect of e-commerce technology, one at the undergraduate level and the other at the Masters level.

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Differential Effects Of Syntactic And Semantic Processing On The Subregions Of Broca's Area, Sharlene D. Newman, Marcel Adam Just, Timothy A. Keller, Jennifer Roth, Patricia A. Carpenter Dec 2002

Differential Effects Of Syntactic And Semantic Processing On The Subregions Of Broca's Area, Sharlene D. Newman, Marcel Adam Just, Timothy A. Keller, Jennifer Roth, Patricia A. Carpenter

Marcel Adam Just

No abstract provided.

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Reactions Of Boranes And Metallaboranes With Phosphines, Lawrence Barton, Oleg Volkov, Mitsuhiro Hata, Paul Mcquade, Nigam P. Rath Dec 2002

Reactions Of Boranes And Metallaboranes With Phosphines, Lawrence Barton, Oleg Volkov, Mitsuhiro Hata, Paul Mcquade, Nigam P. Rath

Nigam Rath

This paper reports extensions of the well-established field of phosphine–borane chemistry. Linked clusters, for example, {[(PPh3)2(CO)OsB4H7-3-BH2-PPh2]2 [(Fe(C5H4)2]}, are formed in reactions of rigid backboned bidentate phosphines with {2,2,2-(PPh3)2(CO)-nido-2-OsB5H9]. Reaction of bidentate phosphines with the unsaturated clusters [8,8-PPh3)2-nido-8,7-RhSB9H10] and [9,9-(PPh3)2-nido-9,7,8-RhC2B8 H11] leads to the isolation of novel species such as {1-(PPh3)[1,3-(µ-dppm)]-closo -1,2-RhSB9H8},with a dppm molecule bridging adjacent metal and boron vertices in the cage, [1,1-(ç2-dppe)-3-(ç1-dppm)-closo-1,2-RhSB 9H8], a mixed ligand system, and {9,9-ç2-[(ç2-BH3)PPh2PCH2 PPh2]-nido- 9,7,8-RhC2B8H11} which contains a bidentate dppm BH3 moiety. The formation of bidentate phosphine-linked main group transition-metal moieties such as [BH3PPh2(CH)nPPh2IrCp*Cl2] is also described as is an example of …

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